[Equest-users] Effective Insulation/Farming Layer R-Value Value

Chris Baker via Equest-users equest-users at lists.onebuilding.org
Wed Jul 19 16:43:28 PDT 2017


I agree with Daniel on this one.

If you wanted to go above and beyond, you could check out Table A3.3 in the section A tables of 90.1 since it has effective overall U-factors and R-values for different construction types and insulation applications – to include steel framing @ 16 o.c. and 24 o.c.

You can select from the insulation R-values for each construction type and from there you can get the overall U-factor for the entire wall assembly which might also come in handy for any detail edits you might need to make.

There is also an R-value calculator online that will allow you to model each wall component and calculate the overall/composite R-value of the system.  It might just be interesting to compare it to the ASHRAE 90.1 numbers in Section A tables or other values online.

Chris Baker
CCI Alliance of Companies
Fort Wainwright, Alaska
907-356-1681 (x105) office
907-750-4922 cell

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Morteza Kasmai via Equest-users
Sent: Wednesday, July 19, 2017 6:16 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Effective Insulation/Farming Layer R-Value Value

There is a wall section in this project with 4” thick interior polyurethane spray foam inside the metal studs.
Since Table A9.2B of ASHRAE 90.1 does not provide the effective insulation/framing layer R-Value for this type of insulation, how can one calculate this value?

Your thoughts and suggestions would be highly appreciated,
Morteza

[https://lh6.googleusercontent.com/Uuukta80GuFfvKouzA0mdSvUXqml7MtSwSiw-evuGMU=w147-h43-p-no]


________________________________

CCI-Alliance Confidentiality notice: This message is intended only for the person to whom addressed in the text above and may contain privileged or confidential information. If you are not that person, any use of this message is prohibited. We request that you notify us by reply to this message, and then delete all copies of this message including any contained in your reply. Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20170719/94a9597f/attachment.htm>


More information about the Equest-users mailing list